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Given the following data on Asian and European Share of U.S. Light Truck Sales(1990-2003):Year t Percent1990 1 16.41991 2 17.11992 3 14.31993 4 13.71994 5 14.21995 6 13.61996 7 13.61997 8 15.41998 9 16.21999 10 18.42000 11 21.22001 12 23.12002 13 23.92003 14 26.6
(a) Plot the market-share data.(b) Describe the trend (if any) and discuss possible causes.(c) Fit three trends (linear, exponential, quadratic).(d) Which trend model is best, and why? If none is satisfactory, explain.(e) Make a forecast for 2004 by using a trend model of your choice or a judgment forecast.
Determine percentage of employees has 5 dependents? Of all employees which have at least one dependent, determine percentage has more than one?
Given a simple random sample of men and a simple random sample of women, we want to use a 0.05 significance level to test the claim that the percentage of men who smoke is equal to the percentage of women who smoke.
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
For commercial banks in each state, the U.S. Federal Deposit Insurance Corporation has determined the percentage of domestic assets. Construct a frequency distribution with 6 classes for this data.
Identify each variable in the formula for the binomial probability density function. Also, explain what the fraction: n! / (n-x)!x! calculates.
Given: You are using a significance level of α = 0.05 to test a claim that p > 0.5. Your sample is a simple random sample of size n = 49. Calculate β for the test, assuming that the true population proportion is 0.7 and showing all work.
A manager receives a forecast for next year. Demand is projected to be 600 units for the first half of the year and 900 units for the second half.
Dr. Justin Case wants to explore whether or not students perform better if they cram for a test (massed practice) or if they space their studying over weeks (distributed practice).
Assume we have a population of scores with a mean of 975 and a standard deviation of 15. Assume that the distribution is normal. Provide answers to the following questions:
Sketch a graph and shade the area of interest. SCores on a standardized exam are normally distributed with u = 60 and o = 5.
The diameters of peaches in a certain orchard are normally distributed with a mean of 5.10 inches and a standard deviation of 0.40 inches.
A bookcase contains 3 statistics books and 4 biology books. If 2 books are chosen at random, find the chance that both are statistics books.
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